如何在PHP中显示文件夹中的next和prev导航？
问题描述：
I need to create a previous and next navigation in one folder using a structure like page 1 page 2 etc My current not-working code is the following:
<?php
$search_dir = "gallery";
$images = glob("$search_dir/*.jpg");
sort($images);
$current = 2;
$prev_img = $images[$current - 1];
$next_img = $images[$current + 1];
// Image selection and display:
//display first image
if (count($images) > 0) { // make sure at least one image exists
$img = $images[0]; // first image
?>
<ul>
<li><a href="<?php echo $prev_img; ?>">Previous</a></li>
<li><a href="<?php echo $next_img; ?>">Next</a></li>
</ul>
<figure><img src="<?php echo $img; ?>" alt="<?php echo $img; ?>"></figure>
<?php
} else {
echo 'error';
}
?>
答
I am bit in hurry please try this code i have made some correction please look into the code, try to understand.
<?php
$search_dir = "gallery";
$images = glob("$search_dir/*.jpg");
sort($images);
if(isset($_REQUEST['image_no']))
{
$image_no = $_REQUEST['image_no'];
}
else
{
$image_no = 2;
}
$prev_img = ($image_no == 0)?(count($images)-1):($image_no -1);
$next_img = ($image_no == count($images)-1)?0:($image_no + 1);
// Image selection and display:
//display first image
if (count($images) > 0) { // make sure at least one image exists
$img = $images[$image_no]; // first image
?>
<ul>
<li><a href="gallery.php?image_no=<?php echo $prev_img; ?>">Previous</a></li>
<li><a href="gallery.php?image_no=<?php echo $next_img; ?>">Next</a></li>
</ul>
<figure><img src="<?php echo $img; ?>" alt="<?php echo $img; ?>"></figure>
<?php
} else {
echo 'error';
}
?>